Finding the Fourth Proportional to 1,152.54, 1,590.57 and 1,074.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.54 : 1,590.57 = 1,074.78 : x
2. Step 2: Convert to fraction form
   1,152.54/1,590.57 = 1,074.78/x
3. Step 3: Cross multiply
   1,152.54x = 1,590.57 × 1,074.78
4. Step 4: Simplify right side
   1,152.54x = 1,709,512.82
5. Step 5: Solve for x
   x = 1,709,512.82/1,152.54
6. Step 6: Final answer
   x = 1,483.26